Grid and arcs from one corner and the midpoints of two adjacent sides, surrounding the corner. Black pencil.
First Installation: John Weber Residence, New York, NY. April 1975.
First Drawn by: Kazuko Miyamoto, Jo Watanabe
Drawn in 2014 by: Andrew Colbert, Sebastian Nordbeck, Max Olofsson, Cristoffer Reschke, Peter Wiklund.